First off check with your DM about the nature of the campaign, whether it's heroic, villainous or otherwise.
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Starting location has an impact:

Ravannah has a generally Evil alignment. Players are not -required- to start as Evil if they begin here, but Good aligned PCs should keep a low profile, and probably avoid the Order Of The Fallen, among others.

Sartarus, Rudik's Pass, and the Kingdom of Sartii in generally are Good aligned areas. Players are not -required- to start as Good if they begin here, but Evil aligned PCs should keep a low profile, and probably avoid the Knights Of The Last Stand, among others.

The Underdark is almost exclusively evil, and furthermore it's a rather racist / nationalistic region. There exists a tentative alliance between Morga Aborathras and Ravannah, for the moment…
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Additionally, there are several non-standard restrictions regarding the alignments available for characters of different racial types. These all reflect the history and developing storyline of the Warj'Arune setting. Please look over the following list of alignment restrictions before you design your characters:

DM's are encouraged to enforce these due to the campaign setting's storyline:

Aasimar MUST begin the game as Good.

Dragonblooded MAY NOT begin the game as Neutral. They MUST begin as Evil or Good, per their lineage (Chromatic or Metallic).